99 f250 vibration
 

the truck has fatory wheels with new 315/75/16 yokohama geolander tires. has a vibration in the console when you mash the gas at highway speeds to pass someone or go up hill. the center u-joint was bad so i replaced it.vibration is still there. would like any suggestions

first go to tire store and check tire balance, also due you have lift? if so might check drive shaft . mite need to lower center

tires are good. got vibration fixed.the drive shaft wouldnt slide on the slip yoke were it goes to the carrier bearing so i took it out and cleaned all the dirt out and lubed it. so the vibration stopped. after that i went about 5 miles and stopped at red light and heard clunk and when i took off clunk again.it feels like soomething loose.i had my wife move the truck backwards and forwards to see if i could see anything. looks like rear diff. is wrapping under braking and acceleration. all u bolt are tight an notking is loose.its driving me crazy any ideas would be helpful.

I had a friend with bad axle wrap issues on a 2000 sitting on 37's. He put on a set of cheap ladder bars and hasn't had any issues since.

This was an issue years ago with Ford. They sell a can of teflon grease and it works great ... I still have two cans that was given to me a few years back by a customer to replace the last bit I used to fix his....

thanks for the info i got that fixed with the teflon grease and now a new problem has started when turning from a stop it vibrates and shakes really bad think the pos is messing up changed rear diff fluid with the ford stuff and the additive any other suggestions for this :argh:

it's a 7.3.... you can feel other vibrations? :scare2: lol j/p man. I would like to hear how you end up fixing this.